While making reference to the whole photo (which is always going to be taken in the past), I'd rather say:

That was me in school,
That was me playing soccer,
That was me sucking my thumb,
That was John running after Sandra
That was me in my last church service

But if I'm spotting myself in the picture amongst other people, I'd say:

This is me, this is John, and we were all with Sandra at her party
This is Mark, Matthew and I. We attended the same church service that day.
This is Andrew and that's me with the bowl hat. It was fun visiting grandma.